<h4>Tool</h4><table border="0"><tr><td valign="top"><b>Name</b></td><td valign="top">Flow Width and Specific Catchment Area</td></tr><tr><td valign="top"><b>ID</b></td><td valign="top">19</td></tr><tr><td valign="top"><b>Author</b></td><td valign="top">O. Conrad (c) 2009</td></tr><tr><td valign="top"><b>Specification</b></td><td valign="top">grid</td></tr></table><hr><h4>Description</h4>Flow width and specific catchment area (SCA) calculation.

References:
Gruber, S., Peckham, S. (2008): Land-Surface Parameters and Objects in Hydrology. In: Hengl, T. and Reuter, H.I. [Eds.]: Geomorphometry: Concepts, Software, Applications. Developments in Soil Science, Elsevier, 33:293-308.

Quinn, P.F., Beven, K.J., Chevallier, P., Planchon, O. (1991): The prediction of hillslope flow paths for distributed hydrological modelling using digital terrain models. Hydrological Processes, 5:59-79
<hr><h4>Parameters</h4><table border="1" width="100%" valign="top" cellpadding="5" rules="all"><tr><th>Name</th><th>Type</th><th>Identifier</th><th>Description</th><th>Constraints</th></tr>
<tr><th colspan="5">Input</th></tr><tr><td>Elevation </td><td>Grid (input)</td><td>DEM</td><td></td><td></td></tr><tr><td>Total Catchment Area (TCA) (*)</td><td>Grid (optional input)</td><td>TCA</td><td></td><td></td></tr><tr><th colspan="5">Output</th></tr><tr><td>Flow Width</td><td>Grid (output)</td><td>WIDTH</td><td></td><td></td></tr><tr><td>Specific Catchment Area (SCA) (*)</td><td>Grid (optional output)</td><td>SCA</td><td></td><td></td></tr><tr><th colspan="5">Options</th></tr><tr><td>Method</td><td>Choice</td><td>METHOD</td><td></td><td>Available Choices:
[0] Deterministic 8
[1] Multiple Flow Direction (Quinn et al. 1991)
[2] Aspect
Default: 2</td></tr></table>(*) <i>optional</i>